Abstract

Dynamic stress or strain distributions in a small helical gear are measured in gear teeth meshing practically by means of the copper electroplating method. The results obtained here are as follows : (i) Characteristic appearances of stress or strain distributions in a helical gear due to the helix angle and thrust are demonstrated illustratively. (ii) Measured stresses in the tooth surface and the root of side surface are compared quantitatively with the nominal stresses by usual design formula and are shown in forms of strain concentration factors, and (iii) the dynamic effects of velocity and load are determined from different operating conditions of revolution speed and torque.

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